Electromagnetically Driven Valve

Abstract

An electromagnetically driven valve is actuated by cooperation of electromagnetic force and elastic force. The electromagnetically driven valve includes a driven valve having a stem and carrying out reciprocating motion along a direction in which the stem extends, a lower disc and an upper disc spaced apart from each other and each having one end coupled to the stem so as to allow free oscillation of the disc and the other end supported by a disc base so as to allow free oscillation of the disc, and a lower spring and an upper spring provided at the other end of the lower disc and at the other end of the upper disc respectively and applying elastic force to the lower disc and the upper disc. With such a structure, an electromagnetically driven valve reduced in height and attaining excellent mounting characteristic can be provided.

1 . An electromagnetically driven valve actuated by cooperation of electromagnetic force and elastic force, comprising: 
 a driven valve having a valve shaft and carrying out reciprocating motion along a direction in which said valve shaft extends;    first and second oscillating members spaced apart from each other and each having one end coupled to said valve shaft so as to allow free oscillation of the oscillating member and the other end supported by a base member so as to allow free oscillation of the oscillating member;    first and second spring members provided at said other end of said first oscillating member and at said other end of said second oscillating member respectively and applying said elastic force to said first and second oscillating members; and    an electromagnet arranged between said first oscillating member and said second oscillating member and applying said electromagnetic force to said first and second oscillating members.    
   
   
       2 . The electromagnetically driven valve according to  claim 1 , wherein 
 said driven valve carries out reciprocating motion between a first position and a second position, and    said first and second spring members apply said elastic force to said first and second oscillating members so that said driven valve is held at a position intermediate between said first position and said second position.    
   
   
       3 . (canceled)  
   
   
       4 . The electromagnetically driven valve according to  claim 1 , wherein 
 said first and second oscillating members are provided movably with respect to said driven valve so that a distance between a position where said one end is coupled to said valve shaft and a position where said other end is supported by the base member is varied.    
   
   
       5 . The electromagnetically driven valve according to  claim 4 , further comprising a sensor portion detecting an angle of oscillation of said first and second oscillating members with said other end serving as a fulcrum.  
   
   
       6 . The electromagnetically driven valve according to  claim 1 , wherein 
 said valve shaft has a buffer member provided between said one end of said first oscillating member and said one end of said second oscillating member.    
   
   
       7 . An electromagnetically driven valve actuated by cooperation of electromagnetic force and elastic force, comprising: 
 a driven valve having a valve shaft and carrying out reciprocating motion along a direction in which said valve shaft extends;    first and second oscillating members spaced apart from each other and each having one end coupled to said valve shaft so as to allow free oscillation of the oscillating member and the other end supported by a base member so as to allow free oscillation of the oscillating member; and    an electromagnet having a monocoil and arranged between said first oscillating member and said second oscillating member; wherein    said electromagnetic force is applied to said first and second oscillating members as a result of current flow through said monocoil.    
   
   
       8 . The electromagnetically driven valve according to  claim 7 , wherein 
 said electromagnet is configured such that when a direction of a current fed to said monocoil is reversed while any one of said first and second oscillating members is being attracted to said electromagnet, said electromagnetic force acts on any one of said first and second oscillating members that has been attracted to said electromagnet, in a direction away from said electromagnet.    
   
   
       9 . The electromagnetically driven valve according to  claim 7 , wherein 
 said first and second oscillating members are provided movably with respect to said driven valve so that a distance between a position where said one end is coupled to said valve shaft and a position where said other end is supported by the base member is varied.    
   
   
       10 . The electromagnetically driven valve according to  claim 9 , further comprising a sensor portion detecting an angle of oscillation of said first and second oscillating members with said other end serving as a fulcrum.  
   
   
       11 . The electromagnetically driven valve according to  claim 7 , wherein 
 said valve shaft has a buffer member provided between said one end of said first oscillating member and said one end of said second oscillating member.